Low-Temperature Belt Dryer
DLT Series
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Centrisys engineers, consultants, and industry experts researched current low-temperature dryers. The goal was to identify critical areas for improvement. As a result, we have successfully engineered a simplified and operator-friendly dryer that creates operational efficiencies and maximizes uptime, all within a compact footprint. Made in the USA and meets Build America, Buy America (BABA) requirements.
Centrisys DLT Low Temperature Belt Dryer
The DLT is a simple, closed-loop dryer using hot water as its heat source. The low-profile design integrates modular heat exchangers into the dryer system. The DLT can be engineered using a dedicated hot water boiler for natural gas or biogas. Waste heat from pyrolysis or CHP cooling water can be used to offset energy requirements.
Drivers for Low-Temperature Sludge Dryers
- Generate Class A Biosolids - dry sludge at a temperature to destroy pathogens
- Reduce sludge volume
- Reduce costs for disposal, landfill, and transportation
- PFAS regulations, minimize risk by reducing volume
Product
- Dried sludge with a dryness level greater than 90% solids
- Reduced biosolids weight up to +80%
- Meets Class A requirements
- Optimized particle size creates minimal dust; allows for land application without further processing
USA Parts and Service - Centrisys DLT is designed built and FOCUSED on USA plants
Smallest Footprint - Increase Flexibility for Plant Design and Expansion
Enhanced Safety - Designed for Plant Operators
Simple - Engineered to Create Operational Efficiencies
USA Parts and Service - Centrisys DLT is designed built and FOCUSED on USA plants
- The DLTs modular sections are designed to accomodate USA sourced, off-the-shelf parts and components
- All parts and components are manufactured, sourced, and distributed in the USA
- All parts and components are stocked at the Centrisys parts distribution facility in Kenosha, Wisconsin
Smallest Footprint - Increase Flexibility for Plant Design and Expansion
- A low-profile feeder design minimizes installation requirements
- The heat recovery system eliminates a single point of failure
- The installation footprint is reduced because of the heat recovery system design
- The modular design allows for less complex dryer sizing to meet plant capacity requirements
Enhanced Safety - Designed for Plant Operators
- Designed to meet NFPA 820/654 standards
- The DLT is insulated to regulate and maintain low temperatures on the outer surface
- All the motor parts and instrumentation meet Class II explosion proof requirements
- An automated sprinkler system installed for safety
Simple - Engineered to Create Operational Efficiencies
- No confined spaces; operators do not need to crawl inside the dryer box for maintenance
- Internal dryer parts are accessible and removable from outside the module
- The compact pull-out heat recovery exchangers are designed for a "swap-in-place" exchange
- The main heat exchangers are a two-piece, split-height panel design
- All doors are hinged, no special tools required
Low-Temperature Belt Dryer
| DLT120 | DLT220 | DLT320 | DLT420 | DLT520 | DLT620 | DLT720 | DLT820 | |
|---|---|---|---|---|---|---|---|---|
| Number of Heat Segments | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Max H2O Evaporation (lb. H20/hr) | 350 | 700 | 1,050 | 1,400 | 1,750 | 2,100 | 2,450 | 2,800 |
| Process Capacity* (t/d) | 5-6 | 11-13 | 16-19 | 22-25 | 27-32 | 32-38 | 38-44 | 43-50 |
| Height (ft) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Width (ft) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Length (ft) | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 |
| Clearance (ft) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Number of Heat Segments | 1 |
| Max H2O Evaporation (lb. H20/hr) | 350 |
| Process Capacity* (t/d) | 5-6 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 18 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 2 |
| Max H2O Evaporation (lb. H20/hr) | 700 |
| Process Capacity* (t/d) | 11-13 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 27 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 3 |
| Max H2O Evaporation (lb. H20/hr) | 1,050 |
| Process Capacity* (t/d) | 16-19 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 36 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 4 |
| Max H2O Evaporation (lb. H20/hr) | 1,400 |
| Process Capacity* (t/d) | 22-25 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 45 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 5 |
| Max H2O Evaporation (lb. H20/hr) | 1,750 |
| Process Capacity* (t/d) | 27-32 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 54 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 6 |
| Max H2O Evaporation (lb. H20/hr) | 2,100 |
| Process Capacity* (t/d) | 32-38 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 63 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 7 |
| Max H2O Evaporation (lb. H20/hr) | 2,450 |
| Process Capacity* (t/d) | 38-44 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 72 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 8 |
| Max H2O Evaporation (lb. H20/hr) | 2,800 |
| Process Capacity* (t/d) | 43-50 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 81 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 1 |
| Max H2O Evaporation (lb. H20/hr) | 350 |
| Process Capacity* (t/d) | 5-6 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 18 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 2 |
| Max H2O Evaporation (lb. H20/hr) | 700 |
| Process Capacity* (t/d) | 11-13 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 27 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 3 |
| Max H2O Evaporation (lb. H20/hr) | 1,050 |
| Process Capacity* (t/d) | 16-19 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 36 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 4 |
| Max H2O Evaporation (lb. H20/hr) | 1,400 |
| Process Capacity* (t/d) | 22-25 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 45 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 5 |
| Max H2O Evaporation (lb. H20/hr) | 1,750 |
| Process Capacity* (t/d) | 27-32 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 54 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 6 |
| Max H2O Evaporation (lb. H20/hr) | 2,100 |
| Process Capacity* (t/d) | 32-38 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 63 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 7 |
| Max H2O Evaporation (lb. H20/hr) | 2,450 |
| Process Capacity* (t/d) | 38-44 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 72 |
| Clearance (ft) | 4 |
| Number of Heat Segments | 8 |
| Max H2O Evaporation (lb. H20/hr) | 2,800 |
| Process Capacity* (t/d) | 43-50 |
| Height (ft) | 11 |
| Width (ft) | 12 |
| Length (ft) | 81 |
| Clearance (ft) | 4 |
Hot Water Temperature In/Out: 194 °F
Max Internal Temperature: 186 °F
* Capacity assumes feed sludge at 20-30% TS and 24-hour operation
More Uptime. Less Maintenance. Fewer Truckloads.
Problem: Typical low-temp dryer designs have heat recovery systems that are:
- Large
- Stand-alone
- A single point of failure
- Located outside the dryer system
During cleaning, the entire dryer must stop operation to complete this maintenance task.
Solution: The DLT is engineered with a set of heat recovery exchangers on each module. If one of the heat exchangers needs cleaning or maintenance, it can be conveniently isolated, removed, and substituted with a spare. The DLTs modular design creates maintenance and operational efficiencies.
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